if (StringUtil.isEmpty(key) || userBean
                    .map(user -> stream(user.getRoles()).get(stream -> stream.anyMatch(s -> (ROLE_VALUE_PREFIX + s).equals(key)))
                            || stream(user.getGroups()).get(stream -> stream.anyMatch(s -> (GROUP_VALUE_PREFIX + s).equals(key))))
                    .orElse(false)) {
                return p.getSecond();
            }
            return null;

        }

        return null;
    }

    @Override
    public List<String> findVersions(Artifact artifact) {
        List<String> versions = getProjects()
                .getOrDefault(artifact.getGroupId(), Collections.emptyMap())
                .getOrDefault(artifact.getArtifactId(), Collections.emptyMap())
                .values()
                .stream()
                .map(MavenProject::getVersion)

        requireNonNull(path, "path cannot be null");
        if (artifact.getGroupId().isEmpty()
                || artifact.getArtifactId().isEmpty()
                || artifact.getBaseVersion().toString().isEmpty()) {
            artifact = session.createProducedArtifact(
                    artifact.getGroupId().isEmpty() ? project.getGroupId() : artifact.getGroupId(),

    }

    private CoreExtensionEntry createExtension(CoreExtension extension, List<Artifact> artifacts) throws Exception {
        String realmId = "coreExtension>" + extension.getGroupId() + ":" + extension.getArtifactId() + ":"
                + extension.getVersion();
        final ClassRealm realm = classWorld.newRealm(realmId, null);
        Set<String> providedArtifacts = Collections.emptySet();

    }

    private CoreExtensionEntry createExtension(CoreExtension extension, List<Artifact> artifacts) throws Exception {
        String realmId = "coreExtension>" + extension.getGroupId() + ":" + extension.getArtifactId() + ":"
                + extension.getVersion();
        final ClassRealm realm = classWorld.newRealm(realmId, null);
        Set<String> providedArtifacts = Collections.emptySet();

        mavenProject.setGroupId("myGroup");
        mavenProject.setArtifactId("myArtifact");
        mavenProject.setVersion("1.0-SNAPSHOT");
        when(artifact.getGroupId()).thenReturn("myGroup");
        when(artifact.getArtifactId()).thenReturn("myArtifact");
        when(artifact.getBaseVersion()).thenReturn(versionParser.parseVersion("1.0-SNAPSHOT"));

    private MavenProject getMavenProject(String artifactId, MavenProject parentProject) {
        MavenProject project = getMavenProject(artifactId);
        Parent parent = new Parent();
        parent.setGroupId(parentProject.getGroupId());
        parent.setArtifactId(parentProject.getArtifactId());
        project.getModel().setParent(parent);
        return project;
    }

    private MavenProject getMavenProject(String artifactId) {

        Map<String, ArtifactRepository> versionIndex = new HashMap<>();

        Metadata metadata = new DefaultMetadata(
                request.getArtifact().getGroupId(),
                request.getArtifact().getArtifactId(),
                MAVEN_METADATA_XML,
                wantedNature);

        List<MetadataRequest> metadataRequests =

                    groupList.size(), roleList.size(), groupIdsForParentLookup.size());
        }

        // Set initial groups
        user.setGroups(groupList.stream().distinct().toArray(n -> new String[n]));
        user.setRoles(roleList.stream().distinct().toArray(n -> new String[n]));

        if (logger.isDebugEnabled()) {